This question may be out of place here, but I tried replacing the ye.class file in minecraft.jar using 7zip and when I try to log in, it crashes with:
java.lang.SecurityException: SHA1 digest error for ye.class
at sun.security.util.ManifestEntryVerifier.verify(Unknown Source)
You can't simply swap out the file?
I had made a post on the forms and someone replied saying they had a problem with flat. We thought it might be related. You would need to check with KyoShinda on the boards for the seed
http://www.minecraftforum.net/topic/1536918-lockup-creating-new-world-142/
Here is the seed I was trying: 268735068
Strongholds seem to get placed anywhere, even under water. It's villages that have restrictions.
No, I'll try to find it.